High-Precision Sensors & Online Analyzers
Engineered for high-temperature fermentation, ultrapure water loops, chemical recovery, and multi-parameter industrial water monitoring.
Wholesale High-temperature S8 Connector pH Sensor Manufacturers, Factory
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Wholesale High Temperature (0-130℃) pH Sensor Supplier, Factories
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China High Temperature (0-130℃) pH Sensor With Temperature Wholesaler, Suppliers
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China High-temperature pH Sensor Used Pharmaceutical Fermentation Wholesaler, Supplier
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pH5806 High Temperature pH Sensor (Shanghai Brand Awarded)
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DOG-208FA High Temperature Dissolved Oxygen Sensor
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IOT-485-pH Direct Modbus RTU Digital Sensor
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ZDYG-2088-01QX Self-Cleaning Optical Turbidity & TSS Sensor
View Technical SpecsEngineering Precision: Industrial TDS Measurement Fundamentals
Total Dissolved Solids (TDS) refers to the cumulative inorganic salts (calcium, magnesium, potassium, sodium, bicarbonates, chlorides, and sulfates) and small amounts of organic matter dissolved in water. In industrial continuous monitoring, TDS is quantitatively determined via precise solution Electrical Conductivity (EC).
Dynamic EC-to-TDS Conversion
Standard pocket meters rely on a static 0.5 or 0.65 conversion multiplier, causing severe drift in high-purity or wastewater regimes. Shanghai BOQU's industrial TDS transmitters incorporate customizable non-linear conversion factors ranging from 0.40 to 1.00, calibrated specifically against ionic chemical matrices such as NaCl, 442 Natural Water, or KCl formulations.
PT1000 High-Precision ATC
Ion mobility increases exponentially at approximately 1.9% to 2.2% per degree Celsius. Without accurate Automatic Temperature Compensation (ATC), TDS data fluctuates erratically with process heat. Our sensors integrate high-stability PT1000 temperature elements directly behind the electrode surface, executing compensation algorithms up to 130°C.
Electrode Geometry & Cell Constants
Proper electrode selection prevents polarization and boundary layer saturation. We engineer 2-electrode platinum/titanium cells with cell constants of k=0.01 and 0.1 for ultrapure water (0–20 ppm), k=1.0 for municipal and cooling water (0–2,000 ppm), and 4-electrode/toroidal inductive sensors (k=10.0) for high-salinity brine up to 100,000 ppm TDS.
Why Sourcing from Shanghai BOQU Delivers Strategic Value
Operating from two state-of-the-art facilities in Pudong and Lingang, Shanghai BOQU Instrument provides a fully internalized manufacturing chain from glass blowing and platinum sintering to surface mount PCB assembly.
100% In-House Vertical Production
Unlike trading assemblers who outsource critical components, BOQU controls raw glass blowing, proprietary reference gel synthesis, platinum electrode machining, and SMT PCB placement under strict ISO 9001 quality supervision.
48-Hour Thermal & Signal Aging
Every industrial TDS transmitter and online probe undergoes a continuous 48-hour burn-in cycle in our high-temperature laboratory. We test baseline drift, capacitive leakage, and signal responsiveness before dispatch.
OEM & ODM Tailored Firmware
We provide full white-label hardware, custom mechanical housings (316L, Titanium, Hastelloy, PVDF), personalized GUI firmware, and bespoke Modbus register maps to seamlessly integrate with your existing automation ecosystem.
Tier-1 Component Economy of Scale
With an annual output surpassing 100,000 instruments, BOQU commands preferential bulk pricing for high-stability ADCs, optically isolated operational amplifiers, and engineering polymers, delivering superior cost-performance.
Global Enterprise Procurement Matrix
B2B instrumentation directors, EPC contractors, and system integrators face divergent project requirements. Below is the technical decision matrix used to determine the exact TDS and EC sensor configuration.
| Application Category | Target TDS Range | Optimal Cell Constant (k) | Electrode Material | Critical Output & Protocol |
|---|---|---|---|---|
| Semiconductor & Pharma Ultrapure Water | 0.01 – 20.00 ppm (µg/L) | k = 0.01 or k = 0.1 | Electropolished 316L Stainless Steel | Isolated 4-20mA, Modbus RS485, Sanitary Tri-Clamp |
| Industrial Boiler Feedwater & SWAS | 0.10 – 100.0 ppm | k = 0.1 | Titanium Alloy / High-Temp PEEK | Dual-channel Relay, Modbus RTU, 0.6MPa Pressure rating |
| Commercial RO & Drinking Water Supply | 10 – 2,000 ppm (mg/L) | k = 1.0 | Platinum Plated / Synthetic Carbon | RS485 direct digital, IoT Cloud gateway compatibility |
| Cooling Tower & Heat Exchanger Control | 500 – 5,000 ppm | k = 1.0 or k = 5.0 | Graphite / Corrosion-resistant PPO | Integrated blowdown relay timer, 4-20mA PID output |
| Zero Liquid Discharge (ZLD) & Brine Conc. | 5,000 – 100,000+ ppm | k = 10.0 (Toroidal Inductive) | Polypropylene / PFA encapsulated coil | Non-fouling inductive pickup, immune to heavy scaling |
Localized Global Support & Compliance Assurance
Deploying analytical instrumentation across North America, the European Union, Southeast Asia, and the Middle East requires rigorous adherence to statutory environmental, electrical, and metrological standards.
International Statutory Certification
Every BOQU TDS instrument complies with European CE standards (EN 61326-1 for EMC immunity in harsh industrial environments; EN 61010-1 for electrical safety). Our wet components feature FDA-registered food-grade polymer declarations, and our production conforms to ISO 9001 (Quality) and ISO 14001 (Environmental Management).
Fieldbus & IIoT Architecture
System integrators benefit from standardized RS485 Modbus-RTU registers, optional 4-20mA HART capabilities, and wireless transmission modules (NB-IoT, 4G, LoRaWAN). Our sensors drop directly into Siemens, Schneider, Rockwell, and ABB PLC topologies without proprietary black-box converter constraints.
Global Engineering Backing
We eliminate project implementation friction by providing bilingual (English/Chinese) engineering support, complete 3D CAD step files for mechanical panel layouts, Modbus configuration routines, and express shipment of pre-calibrated replacement cells via global hubs.
Technology Evolution: The Future of TDS Water Analysis
The continuous water analytics sector is transitioning from reactive local displays to proactive, AI-driven predictive control. Shanghai BOQU is pioneering three distinct architectural breakthroughs.
Embedded Edge AI Diagnostic Algorithms
Modern BOQU smart probes measure electrode double-layer impedance in real time. Machine learning algorithms embedded in the sensor head evaluate surface coating, scaling buildup, and electrode erosion, signaling maintenance warnings before measurements drift outside acceptable tolerances.
Direct-to-Cloud Digital Transmitterless Probes
By migrating the A/D conversion circuitry directly into the sensor connector head, our IOT-485 series eliminates expensive secondary transmitters. Probes communicate directly with edge industrial gateways or cloud platforms, slashing panel cabinet footprint and capital expenditure by over 40%.
High-Frequency Toroidal Induction
In harsh chemical recovery and zero liquid discharge systems, standard metallic pins corrode or foul rapidly. BOQU's next-generation toroidal electrodeless sensors utilize alternating magnetic fields to measure solution TDS without direct metal-to-liquid contact, ensuring zero maintenance in hostile chemical environments.
Engineered for Heavy Duty: Localized Application Scenarios
Across diverse operating landscapes, BOQU continuous TDS meters and conductometric systems provide the bedrock data required to keep plant processes efficient, compliant, and cost-effective.
Reverse Osmosis (RO) Desalination
Online TDS monitoring across membrane arrays evaluates salt rejection percentages in real time. Sudden spikes in permeate TDS indicate seal breach or membrane pinholes, allowing automated diversion to protect downstream polishing beds.
Power Generation SWAS & Boilers
Dissolved minerals in high-pressure steam boilers form insulating scale on water walls, precipitating catastrophic tube failures. BOQU k=0.1 cells detect sub-ppm mineral breakthrough in condensate polishing loops, safeguarding capital machinery.
Commercial Hydroponics & CEA
In closed-loop vertical farming, precise TDS/EC tracking governs fertilizer dosing valves. Maintaining specific ionic strength ensures root systems absorb macro and micronutrients efficiently without burning crops.
Cooling Towers & Heat Dissipation
Evaporative loss continuously concentrates dissolved minerals. BOQU TDS controllers automatically actuate blowdown bleed valves and chemical scale-inhibitor dosing pumps, optimizing water reuse cycles and stopping heat-exchanger scaling.
Industrial Wastewater Outfall Compliance
Environmental statutory regulations penalize high total salt discharge into municipal sewers. Installing BOQU continuous TDS monitoring panels at the final outfall weir logs verifiable compliance records for regulatory audit boards.
CIP (Clean-in-Place) Caustic/Acid Recovery
Food and pharmaceutical facilities use inductive TDS/concentration probes (such as the SJG-2083CS) to monitor acid and alkali washing solutions, enabling dynamic chemical recycling and cutting detergent costs by up to 30%.
Frequently Asked Questions on Wholesale TDS Meters
Essential engineering and procurement considerations addressed directly by our senior technical staff.
What is the fundamental difference between TDS and Electrical Conductivity (EC)?
Electrical conductivity (EC) measures the water's ability to conduct an electric charge based on all free ions present, quantified in µS/cm or mS/cm. TDS represents the estimated mass of dissolved solids, expressed in parts per million (ppm) or mg/L. Because an online meter cannot weigh dissolved mass in real time, it converts EC into TDS using a conversion factor (typically TDS = EC × 0.5 to 0.7). BOQU transmitters allow operators to customize this factor precisely to match their process chemistry.
How does Shanghai BOQU assure calibration traceability for overseas export?
Every sensor is calibrated across multi-point NIST-traceable standard solutions (84 µS/cm, 1413 µS/cm, and 12.88 mS/cm) under temperature-stabilized bath conditions. Instruments ship with a factory inspection report documenting cell constant verification, response slope, and insulation resistance tests.
Can BOQU sensors operate under high pressure and steam sterilization?
Yes. Our high-temperature series (such as the pH5806 and specialized conductometric probes) feature reinforced glass formulations and high-temperature polymer bodies rated for steam sterilization (SIP/CIP) up to 130°C and process pressures up to 0.6–1.0 MPa, validated in our high-temperature laboratory.
What communication outputs are available for SCADA integration?
BOQU industrial transmitters offer standard isolated 4–20 mA analog outputs, dual SPDT high/low alarm relays, and digital RS485 Modbus-RTU interfaces. Our IOT-485 digital probes can output Modbus-RTU directly from the cable head, enabling direct connection to PLCs, RTUs, or IoT telemetry units without an intermediate controller.
What is the standard OEM/ODM lead time for international buyers?
Standard catalog meters ship within 3 to 5 business days. Custom OEM configurations—including personalized silkscreen labeling, custom cable lengths (up to 50 meters), pre-configured Modbus registers, or specialized process threads (NPT, PG13.5, Tri-clamp)—typically require 2 to 3 weeks for volume batches.
Integrated Online Analyzers & Multi-Parameter Panels
Explore BOQU's complete water quality instruments engineered for industrial effluent, power plant cycle chemistry, and automated municipal monitoring.
DCA130 Online pH & EC Dual Channel Analyzer
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MPG-6099Plus Multi-parameter Integrated Water Quality Panel
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pHG-2081Pro Industrial Online Process Transmitter
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SJG-2083CS Online Acid & Alkali Concentration Meter
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Continuous Online Residual Free Chlorine Analyzer
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SWAS Trace Silicate, Phosphate & Sodium Analyzer
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TOC-3042 High-Precision Online Total Organic Carbon Analyzer
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Automated Effluent Compliance COD, TP, TN & NH3-N Analyzer
View Technical SpecsConsult an Application Engineer for Custom Wholesaling
Whether you require standard conductometric probes, custom-branded transmitters, or complete multi-parameter monitoring stations, Shanghai BOQU's engineering team provides detailed schematic reviews and quotation packages within 24 hours.